[Mapserver-users] Cascading WMS Problem

Tue Nov 11 00:40:17 PST 2003

On 10 Nov 2003 at 15:54, Daniel Morissette wrote:

Date sent:      	Mon, 10 Nov 2003 15:54:19 -0500
From:           	Daniel Morissette <morissette at dmsolutions.ca>
To:             	bartvde at xs4all.nl
Copies to:      	andreas.mueller at bfua.de,
  	"mapserver-users at lists.gis.umn.edu" <mapserver-
users at lists.gis.umn.edu>
Subject:        	Re: [Mapserver-users] Cascading WMS Problem

I was able to reproduce this as well. I have no clue why this happens, 
but I filed a bug about this:
http://mapserver.gis.umn.edu/bugs/show_bug.cgi?id=479

Please add any more information you may have to the bug.

BTW, I don't think it's MapServer that's wrong in *thinking* that it got 
a 500 status ... I think it's more that the remote server doesn't like 
the request that MapServer sends and really does produce a 500 error.

Daniel
-- 
------------------------------------------------------------
  Daniel Morissette               morissette at dmsolutions.ca
  DM Solutions Group              http://www.dmsolutions.ca/
------------------------------------------------------------

Hi Daniel,

that's consistent with the exception the remote server sends, which I already cited in my 
first mail to the list.
Here it comes again:

<head><title>Error: 500</title></head>
<body>
<h1>Error: 500</h1>
<h2>Location: /GeoOgcWms1.3/servlet/BK50</h2><b>Internal Servlet Error:</b><br>
<pre>java.lang.NullPointerException
	at 
de.aedgraphics.geoogcwms.ogcwmsservlet.ServiceDispatcher.dispatch(ServiceDispatc
her.java:225)
	at 
de.aedgraphics.geoogcwms.ogcwmsservlet.OgcWmsServlet.serviceRequest(OgcWms
Servlet.java:590)
	at 
de.aedgraphics.geoogcwms.ogcwmsservlet.OgcWmsServlet.doGet(OgcWmsServlet.ja
va:469)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java)
	at org.apache.tomcat.facade.ServletHandler.doService(Unknown Source)
	at org.apache.tomcat.core.Handler.invoke(Unknown Source)
	at org.apache.tomcat.core.Handler.service(Unknown Source)
	at org.apache.tomcat.facade.ServletHandler.service(Unknown Source)
	at org.apache.tomcat.core.ContextManager.internalService(Unknown Source)
	at org.apache.tomcat.core.ContextManager.service(Unknown Source)
	at 
org.apache.tomcat.modules.server.Ajp12Interceptor.processConnection(Unknown 
Source)
	at org.apache.tomcat.util.net.TcpWorkerThread.runIt(Unknown Source)
	at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(Unknown 
Source)
	at java.lang.Thread.run(Unknown Source)
</pre>
</body>

It seems that the remote server can't handle the request MapServer sends. Now I don't 
think it's very **OGCish** to send a "ClassNotFound" exception if a piece of software 
doesn't like a request.

Andreas

-- 
Dr. Andreas Müller
Medien und Umwelt
Breite Straße 21 			Rüttenscheider Straße 61 
53111 Bonn 				45130 Essen 
Tel.: 02 28.9 73 83 90 			Tel.: 02 01.79 49 41 
Fax: 02 28.9 73 83 91 			Fax: 02 01.79 49 42 
info at m-u-u.de				www.m-u-u.de